(Problem to be Solved)The present application is to provide an all-solid-state lithium-sulfur battery that experiences little reduction in battery performance even after repeated charging/discharging cycling, does not generate toxic gas when damaged, and does not require addition of equipment or the like for management of moisture or oxygen concentration; and a production method for the all-solid-state lithium-sulfur battery.(Means for Solution)The present invention uses a positive electrode that contains sulfur and a conductive material, a negative electrode that contains lithium metal, and, as an electrolyte layer that is interposed between the positive electrode and the negative electrode, an oxide solid electrolyte to achieve a high-performance all-solid-state lithium-sulfur battery. According to the present invention, after a positive electrode slurry that contains sulfur is applied to a positive electrode side of an oxide solid electrolyte formation body and dried to form a positive electrode, the oxide solid electrolyte molded body is mounted upon a lithium foil that will become a negative electrode and adhered to the lithium foil. Said process allows for efficient assembly of a battery cell that is configured to have an oxide solid electrolyte interposed between a positive electrode and a negative electrode.